Cron-like time parsing utilities for scala.

The most important class of this package is the cronic.Schedule class. It represents a recurring event based on date and time filters. It can be parsed from a cron-like/systemd-like string and used to predict future events.

(try it with ./mill cronic.jvm.console)

// Create a schedule from a string (see apidoc for the syntax)
val schedule = cronic.Schedule.parse("*-*-1 20:0/15:00")

// predict future events
val now = java.time.LocalDateTime.of(2023, 10, 28, 0, 0, 0)
schedule.predictions(now).take(5).toList
// List(2023-11-01T20:00, 2023-11-01T20:15, 2023-11-01T20:30, 2023-11-01T20:45, 2023-12-01T20:00)

There's an interactive application (based on ScalaJS) to generate schedules at jodersky.github.io/cronic.

This package is built for Scala 3 on the JVM, JS and Native.

ivy"io.crashbox::cronic::0.1.0"

Note for JS and Native: the end-user application (i.e. anything that requires linking), will need to include and implementation of the java.time package. It is recommended to also include the scala-java-time library in such projects.